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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6188167a9a9bbe6361a8823bc15e8a4dbb8d4b83287694030bb2c25fc39be911' 
  AND token = '3w5b/Lb+KIA3We8cRATU0EHno/0zS5OCzOmefa+hFJ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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