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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07a4712904afe25116a07a0c49ea166fb6c40c0a7226079b13db69a50359aeee' 
  AND token = 'BrhtC1XyZJrLbhm7P30rFUVDUeZVLQzmFQzmgkWq2/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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