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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fd2329bd1eb5b9e6d00e9202cfb10ded250b1a41bcbe5191ca23416365c5ed7e' 
  AND token = 'PERl/sRDUkSkPKrjTEuYZ6FgFaV4qPM+nLkNjsDWZpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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