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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3137444841aa47eb3d63e10528f2d726568dc83796a36f146fbbe4f21ebff990' 
  AND token = 'Ca7p/Ts7ezilRNl6BYy86C65fgeq/TTfsIt9S+2fzJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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