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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bccaaeee441508e1485ea1dcad98f1b527bf175100ebca4f0928c1d8fa04987c' 
  AND token = 'm8oHJpYhyWGPJ2TKk61qlJW+9q4384wtl+vBYUt/qVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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