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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd3010f9a4f35671fea8e66ad16c0bf5fabc030514d61ff134c302c7bc18b031' 
  AND token = 'yk+kc+ntcAlNuEgytTyuuou2kLjU4mGQJbDSiksyemc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00160

JSON explain

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