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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dd3a32fcd7aa340fbf713b8e709f9f5fc41c548a34801e5d399b26eaa08fd2b' 
  AND token = 'G0gyadVJgiUJnC0xZA5DsrKm63zUVwE1nS0LPMXwdVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00115

JSON explain

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