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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '674e295f2b98fdd4110983bcf1fd0f39bc62955f1f5e906af848097e257b050f' 
  AND token = 'C/CEFszKjqol2CM4h4u5IM6zPbFe1g/b0BaIk+6C7gA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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