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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d418f4979c46d9d8e7cc29caeab3b944eb09e27629ba1a5177869f9b44ab348' 
  AND token = 'JzDBKOtC7Dfjq4M39W60vGPz2HqzHwkM1DanhOp3pKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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