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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63f49a8d34abee24f4fd16fe5b9bfbe102d316221b10185e2cfe12e37faf2b0d' 
  AND token = 'xkvF6xx8fUrtkhQgiZMcAUJ3qXElS8LpkLY62QHv314=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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