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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95ea3464af096fd9e53e48a321d9b8ed76f3e639c0a3e27bce104ba9d37bf04e' 
  AND token = 'mCmE0TlGXUSE+PUcDsw/fPCIeGnz7W6C9LL8TCCSPbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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