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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c563dcbd72f3eaf20502c86e8745459dd41d34f98951b5ffc10ae10932d85e13' 
  AND token = 'RlTMiSTunAZ7qUIjHfVEgSKGl2n1dkGdemhTV06T/m8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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