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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4bb5258cf2ef8cbc1c5051bfce31ede7ccdd88bfb498e5f683e26504be132065' 
  AND token = 'XgsvyXk67fmCWjfsz9S1wEfmPkTq9muXqQ1B01bngRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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