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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9d495770cf182d80a1e4aad625c00f49822459faf21aa1fb12c56a747ce7b3f1' 
  AND token = 'f8XEPKuLOv97zVMU+cTzRiF6//iQOY4VHi6G4nOfci0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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