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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '071eda2ae7bff51fe266f2789d5ab7c5947e5f377efd6e80aab00a4f03bf8382' 
  AND token = 'FZvPXEB55/baSM8Id/P4xf3m3Rp3IxzpuC2RW2UStUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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