SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b7485b89e6bceb67879bd1d03b3397a25eae416916547d8e29d5dc3668526c3' 
  AND token = 'EGkHhvLAVRnwYzprpSQAj7soS2rI/JRyHWPS5g4NB1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}