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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbcc122b4f09215f01613798bda48cdd73dc46ac6d831dceff153df4d5051049' 
  AND token = 'Uc/bv3SEP1n8131kv/V9JG2Q5xtt43rU3iKFy31gyRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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