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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbd0b50070608e2a99ed8de5db300ecbfc4e52cbd4fe353aef47f7436cb00b18' 
  AND token = 'hkidOP6WE3/zkuhDpTRECSylgp91C2QDeKkcsbdXNtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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