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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '40bf4d096c6ca687bec3bf7dcd4769b763f6b009fd1e6b9b286c24d038833163' 
  AND token = '3Zc1fPLX7KmELPZIg3ajGFrxyCpgzArQqNUtrAYDgzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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