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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07ef48c6ca0b0f3d1fb4f936177a9ebb732cad1165ad6df4b2b6e75cab8bed1b' 
  AND token = 'zuyFokTsAEpqjq+Is7JssaTpOHb2ZItXPDHbotRarGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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