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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c62edece9fe7c52664a31d0e5c444a168163f4fab73a7a10633294f6cccefd2' 
  AND token = 'MzcqefM4G76Xd650i32xXqXbwBcBj/Q/SzJ38u1FqOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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