SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8eb30ccea1c3739a0653c18789d667071e45d3f01924e8da3bfa4abb743684d2' 
  AND token = 'W/bsNkLH/TLXdFDzLeZCTJS/O3RKy5vWVAT+CQDBUUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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