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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'b45c72af81a5b63c9d114e6fa79daa5eb4ad9531ed94fc7cb00cb15b9edd657c' 
  AND token = 'CoZkrdLSBLEGkwrUNyPcG593GoCWAc0vI3qX/qEo9zo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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