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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b74a9cc0b94b1f755bf77f7bff6811a0c57064a909448937ec67f8bb6e38301' 
  AND token = 'ejDilajoaSuXJcbyE055Ue0TRHjJl922l+1SA+GQKDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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