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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '730569aba4306fd8ed5a7dcc0a0a0c6d8d1be36b7baeb970e0698b6998580efa' 
  AND token = 'd3Fl97hAvJhHLqyAeM2++d5vadVhPlQHyfU77cLy6LU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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