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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37ed04077f51d72cdd2d3106b72887f259a80d378d1efc41df1ae5384b9822e9' 
  AND token = '2iKt+yviLGTTXhWx5HmB+OxsWLJQUlo+dJx3W1Fc0U8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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