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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e40475dd2dc5ffd922d2758ae3aa523cf9cfcdf5db4b40c2a4baf7e8eaea3ee8' 
  AND token = 'GSWVtPBXs1C4BNWD6q1cmQVBHvSUX2uN4fiJJyq7mY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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