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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c4d5d413981f3ab3ea43631c510dbbe067ee3b7d313d38a2566c485c5cab100' 
  AND token = 'PjIjv03lC4DzaPyDjhKxQ51ZVfV01iiL5PwKHcnbpF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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