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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e25f3872dd9b97d4551b1dd6e61ffded863ddccf6c0f4f0a0b78feadc57ea2c' 
  AND token = 'N1EePVb5qUsaiM+pdxIvAM9SXKWtE3dJ2aJqkOQMZxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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