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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba47607a13e8f65865afe923a86106e5f744d80c3b0aa1bda77aa1fd01ff6e2a' 
  AND token = 'za4DYAP3M0q+bg0K95971/XVNUBo7kWHG/EieDzWHHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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