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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2ae944e924c9550e667f26ebcf38c168bfae530b7c9cbf21eecb62d9e6b83f5' 
  AND token = 'zUf5XeaAMMY9if3jB3DgQsaVWh/JzA7HoiSLjAuKoSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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