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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5470072314416e0ce7cbd03c5b5023ca94df3b1d4fbb73e43072b7ae06193752' 
  AND token = 'ha01XziG7FDCSC8l9Khh0HoPD+jnAzfF/wG/fTkSvAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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