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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5687a16f37781e50ac5cb006390de7f4854a1ba4cc16ed82ec4e74b2a40c593c' 
  AND token = 'RAYfVtUAA/CJO/mQVA7l3XAUwe3nDTDcXOAE6HwkH8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00181

JSON explain

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