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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30a5e86d64a13612615c10eaa78d4e9c196fa723028132e87ec28ab23a4c6105' 
  AND token = 'umBtGDuEJGAgh7yKr3gB/s+gvYNtLtcbn0QFy+PC6mQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}