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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48c92977c2661ed1cd4e3e0a3d828e5065b3ebe66452c038b4b1dd2a21362870' 
  AND token = 'Y01Q7o3FrL2bu2DEnxDdZcN+kBGOmGx/HPo7FSA6U/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00130

JSON explain

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