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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebdc948c3b6e4164598004d7e380a163a19ccbddbed19f33ecb6e542536c62b6' 
  AND token = 'g61RLANT/dow8YlcfJyIM+ctWviFFFijM6MX06J8+9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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