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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '706ab5e0224110de754068c1a11e21ff2198c7eb102462b939c0c5d241d7a081' 
  AND token = 'ngU+G+vM/Dx2kXfWbLFTkb5UIhTJQ6EatU03wVuEJ0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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