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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '114fccd82dd1b3fce9fa82a5d0d8786cd5a5d8f8eabf9c09260476ef21429e7a' 
  AND token = 'Z3edtCgt548R4KU9ke/5CcScx9iFtO/HeXNw9E78/vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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