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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c010b4c1eb6a431c7851f97143c0973abea400141a3f5157ca323ad2c70c38b9' 
  AND token = '87zeTG6JnQWUlzvS6a/vcje5jwCiTbmxtGbBk4eqQts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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