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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '153c706c23f5729fa9d5dca01b5762b6282ae5473533879761d9b681edb18df7' 
  AND token = 'yvp153pODBdPwhcgsDtylAvzBtj1SaVoNN4Qb6oyuHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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