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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5aa882fb298e5058017abae59be69d06d7c3a3b89936ab0509b4410a10eb06d' 
  AND token = 'XD8Lv3Zla2zaTwyNhN5KQhWA5jrQB7eSAtA94jiDuPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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