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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdc8c5a0f9ce43d473758e0c7bc9b5cb8151344a9a7ec9a11a4e734001ebc5a9' 
  AND token = '+ni8Elh1bJG1kEFnU+rh9hHfJZGyk4X2DX6loJflttc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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