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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '410ad5c2a35626ec767a640e3c9292582ea4f59ae60909fdf2c48dc24dd0d861' 
  AND token = 'DraKXdBngXUS42XnDEs+2g2nBNlTkc1Xrrg3kMJilbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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