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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64b657a9530c406b3e242b078e4c87ec45bdabfbe7c04401fe5d89797a9d664a' 
  AND token = 'KkGcyQFWUNte6iNUS5RNXlVwjx1twv91Yklv+vbZN6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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