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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b03c736a9388deb438f4ec4529e47bb7050fc154cad6e1a85443589ec30277b0' 
  AND token = 'yph22Iljl3hwGFk2TlYucz1neQ977xFhrneKAg9SO6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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