SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed4dd064784fbed0bd8f88295cd0a94d759925c52b4d5c88b52f5e60dd5c21a0' 
  AND token = '8yYw+07XiAuY1r0FftV9qSICjqjjn171++Li2BBNUu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables