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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '095992cc106da4a932c8dedc9bacf17122319302553bdd7253d47deee7fc0712' 
  AND token = 'jUecPNwb9bsQhtqzaMfIEi4g3+BF7YESkhfwamT8w7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00172

JSON explain

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