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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ec0416beebe669a95d11c076ea85abd5414d739731ad9982ed53092e06e7f8f' 
  AND token = 'ioKJ+ziLA4uirGfZtPM72DWQUF0/rEWQy4L/zreTCcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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