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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5db18cbbb148ca07e648d9d07524b4b86872cc7856fbada3b1664145424dec33' 
  AND token = 'j5nfSm8K8kmNFh0CG1kCRMBuZxyLn+uGrBLO9TS6b00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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