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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd58b7d029a3ab92c9a6b7318dfcaa213e67a0ee34c67358ae34107c653d29fa1' 
  AND token = '3AnagyLk6RdqWGHvRR87gAKvEzG3ZNF8voxXeigafeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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