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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abd786c6f2653480c37795f6289f978403c200647cd6b4a4de99f129dec1bc4e' 
  AND token = 'ot/RfL/B0HZ5+8c0HoNZbklzH/9zYpSLxh+gb1G28uE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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