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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '31dee06d3fb17497c0d0824317a5fa0472796307b1c4b8b00c74fd534870915f' 
  AND token = 'P0d88feA5/HZhm1R80GqMmBJo0VQbHbrlGpnL2dfy5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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