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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1fed94e05dcdc9464590273432d662f826859b94dcd10ab187ef10763f29eee' 
  AND token = '0Dg4bfJO8xWoCPMhhevf6QZO2in1//pcugsHQHLE7xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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