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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5926dcc09fd53d1c7f56c90713c7b43f9c460a435f7774e80873adc329129bee' 
  AND token = '6Y9mj8q4mWLKwtLe7XYCpl8jh7srioenR4NknMs/WQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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