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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee22c14deed9d0919e66bf7b2ce5e88600d6c7a31440e184b2edd71c7d4020ba' 
  AND token = 'iDAQDsZDhQMuw744MHV6E+uGm/krmHZgKU7ulVK4OxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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