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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bfaecea322a1bae9a2ffc4319d1fc91c2a58c23cc4b35ed9f4949d8482e0f24' 
  AND token = '72NvK497LnSZ9M2tcPeYJEx+7p2qLYrovv3YM5FYd0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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