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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0954875306c4c64524373a34ce13dc234f762c2a9a808bbad77d575aacf51885' 
  AND token = 'JbJ5XI5jmEhc8/T1/XhtRf8XFmbCFN5m+q/HgJrXxhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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