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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78a8b05bc72b7b3e7c2e574b2a3cdab982ea7c2b28b6d79e58c7358f0ac57e79' 
  AND token = 'wuWuL60Y/q4Y4ngEXMB8o1ofYH2KCZE0PfSHrITbihg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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