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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fd8569fe0b01f64426b3a6d0af5956dca0b6376d0967bc3941350365b190ca3' 
  AND token = '4XN/auO6Pqdul1yZN8+L4UxcDexWhyW31HXrvX3e8/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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