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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06f5ce07b5ff974f9416f9892979b871f67df22c459215d125dbc8f2d4e7c8c7' 
  AND token = '0ywewBl/3RwTnIW+IPddtZ7vo81sJBPw8jlVm0t/tJ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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