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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd43fe190a20c32f30374a97f239a52e865a869a2e27a8424343fd450efc88ccb' 
  AND token = 'vgtp9BH49K8pXF0ku5pxO5O6DoqAxiYoQrWCh2lDpGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}