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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58b9f2f00872dc54183accd8f2cc33623d1d4eb205cf16f6f0848a3483330487' 
  AND token = 'Jk2VqsYCOaO10IaOef/yzTkgfb6o5PNaK3fLgyisYdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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